Eurasian watermilfoil

Eurasian Watermilfoil (EWM) is an invasive, non-native species present in Lake Johanna.

Timeline

EWM was discovered in Lake Johanna on 6/13/2016 in 2 locations (SW corner and N side) by a Conservation Corps MN crew performing baseline AIS surveys for the MN DNR. Unfortunately, the DNR did not notify the LJIS.

On 10/13/2016 a neighbor notified the board that a sign announcing the presence of EWM was posted at the public access. We contacted an invasive species specialist at the DNR.

On 10/27/2016 the DNR visited the lake and “found a good amount of EWM widely distributed in areas around the lake." This map shows the details of their observations.